Shackle



Patented Oct. 14, 1941 v YSHIACKLE.

William Stevenson, Blundellsands, Liverpool,

. England Application July 3, 1940, Serial No. 343,897

' In Great Britain July 17, 1939 7 Claims.

This invention is for improvements in or relating to shackles of the type having holes or eyes in the ends of the shackle jaws, through which a closure pin'or the like is passed, at least one end of the closure pin being screw threaded to screw into a correspondingly threaded eye in the shackle so that the shackle is closed when this pin is screwed home. It has already been proposed to provide an abutment on or adjacent the screw threaded end of the pin and said jaw having a recess to receive the abutment when.

the shackle is opened, the base or end of said threaded end of the pin is free to slide in the i recess serving as a stop for the abutment to prevent the entire removal of the pin. The depth of the recess is such that the threaded end of the pin can be retracted entirely or almost entirely into the recessed jaw of the shackle so as to leave the space between the jaws clear for the insertion of the means to which the shackle is to be connected.

For some purposes, as for example when it is necessary to re-anneal the shackle'and its pin it is desirable to be able to remove the pin entirely. The present invention therefore provides an improvement in shackles of the above mentioned type and having a recessed jaw to receive an abutment on the pin, according to which a passage-way opens into the side of the recess for the abutment and leads to the interior face of the jaw so that by turning the pin the abutment can be turned along said passage-way and released from the stop and the pin removed entirely from the shackle. tion to shackles in which both ends of the pin are screw threaded to engage correspondingly screw threaded jaws, the threaded end of the pin adjacent the abutment being of smaller diameter In applying the inventhan the other end, the abutment is shaped so that it will cooperate with the screw thread in the recessed jaw of the shackle and permit the pin to be screwed entirely out of the jaws.

The invention will be further described by way of example with reference to the accompanying drawing, whereon Figure 1 is a part sectional elevation of one embodiment of a shackle according to the invention with the closure pin in the closed position,

Figure 2 is a transverse sectional view on the line IIII of Figure 1,

Figure 3 is a transverse sectional view on the line IIIIII of Figure 1,

Figure 4 is a fragmentary view of the pin showing a modified form of abutment, and

Figure 5 shows an embodiment of the invention in which only one end of the pin is screwthreaded.

In the embodiment of the invention shown in 13. The end of the pin has a turning head 19 for screwing the pin home in the closed position.

In order normally to prevent complete dislodgment of the pin M from the shackle an abutment 20 is provided on the pin adjacent .the threaded portion of the end I1 and when the pin is in the closed position a part of this abutment lies in a counter-sunk recess or chamfered portion 2| in the inside face of the jaw Hi. This prevents damage to the abutment. The jaw H having the eye I3 is slotted or recessed at 22 on its interior face to receive the abutment 20 when the shackle is retracted from the closing position but the slot 22 is not carried through to the outer face of the jaw so that a stop 23 is formed by the base of the slot, against which the abutment 20 rests as the pin is withdrawn with the abutment in alignment with the recess after the threaded end I! has been unscrewed from the jaw If] so that the shackle pin cannot normally be disengaged entirely from the shackle. The depth of the recess 22 is such that theforward end I! of the pin is accommodated sufficiently within the jaw II to leave the space between the jaws clear for the insertion of the part to which the shackle has to be connected.

For some purposes, however, it is desirable that it should be possible to remove the pin entirely from the jaws as for example when it is necessary to repair the shackle or re-anneal or replace the pin. For this purpose the abutment 20 is shaped so that it will mesh with the thread I6 in the jaw ll. After retracting the pin until the abutment 20 engages the base 23 of the recess 22 it is possible by turning the pin to screw it entirely out of the shackle, the threads on the jaw ll adjacent the outer face thereof co-operating with the abutment 20 for this purpose. It will be seen that in eifect the thread 16 in the neighborhood of the stop 23 forms a passageway leading from the recess 22 to the outer face of the jaw ll, along which the abutment 20 can be withdrawn clear of the stop.

In the modification shown in Figure 4 the abutment is in the form of a spring 24 but is still shaped so that it will co-operate with the threads in the jaw II to permit the pin to be removed entirely. The spring form of abutment has the advantage that it can be pressed way 25 leads from the recess 26 to the outer face;

of the jaw H so that the abument 21 can be.

turned clear of the stop 28 to permit the pin to be withdrawn entirely.

It will be appreciated that in all the examples.

above described whilst the pin can when desired jthreaded ends to screw threaded eyes of the shackle jaws, an abutment 4. A shackle comprising a U-shaped body part, the jaws of which have eye-holes both of which are screw-threaded the screw-thread in one eye being of greater diameter than the screw-thread in the other eye, a closure pin having screwinto said internally located on the pin at the end thereof having the threadof smallest diameter and so that it lies against the interior face of the jaw when the pin is. in the closed position, and a recess on the be removed from the shackle by a positive turn-' L ing movement thereof to release the abutment from the stop, nevertheless the stop' isstill ef fective to prevent accidental dislodgment of the pin from the shackle duri g normal use thereof.

I? claim: I; shackle comprising -shaped body part, the jaws of which have eye-holes, at least one of 'which'is internallyscrew-threaded, a closure'p'in having a screw threaded end to screw into said internally tl tl'readed eye h'ole, an abutment located on the pin so that it .lies adjacent one jaw'whe'nthe pin is in the closed position, and a' recess on the interior face or th other'jaw, the base of which recess forms a stop for the abutment tolimit the movement of the pin when the pin is in fully open relation to the jaws of 'th'ebody; said recessed jaw having a passageway which opens intothe side of the recess and leads t-othe exterior face of the jaw whereby by turn"- ing the pin the abutment can be turned along the passage-way to release the abutment from the" stop.

2"; A shackle comprising a U-shaped"bodypart,

'the'jaws of which have eye-bolts, at least one of which is internally screw-threaded; a closure pin having a screw-threaded end' to" screw into said internally threaded eye-hole, an abutment located on the" pin .so that it lies adjacent the interior face of one jaw when the pin' is in the closed'position, and arecess on the interior face of the other jaw, the base of which recess is adjacent the exterior face of the said jaw and forms a stop for the abutment the abutment engaging: the stop to locate the pin wholly free of any'projec'tion within and betweenithe jaws, saicf recessed jawhavin'g a passage-way which opens into the side of the recess and leads to the'e'xt'erior face'o'f the jaw whereby byturning the pin the abutment can be" turned along the passage-way to release the abutment from the stop: 3; A shackle'comprisinga' U-shaped body part, the jawso'f which have eye' -holes'both of which are'screw-threaded the screw-thread in one eye 'being'of greater diameter than the screw-thread in" the other eye, a closure pin having screwthreaded' ends to screw into said internally threaded eyes of the-shackle jaws, an abutment located on the" pin at the end thereof having" the "thread of smallest diameter and so that it lies against the interior face of the neighbouring jaw when the pin is in the closed position; and arecess on the interior face of the other jaw, the base of which recess forms a stop for the abutment,v the abutment beingshaped as part of a screw-thread of equal-"diameter to that of the larger threaded end of the pin so that it will co-operate with the screw-thread in the recessed jaw of the shackle and permit the pin to be screwed entirely out of said jaw.

interior face of the other jaw the base of which recess is adjacent the exterior face of said jaw andforms a stop for the abutment, the abut- Inent being shaped as part of a screw-thread of equal diameter to' that of the larger threaded end of the pin so that it will co-operate with the screw-thread in the recessed jaw of the shackle and permit the pin to be screwed entiie'l'y' out of said jaw.

5,. A' shacklelas'claime'd in claim 1, wherein the jaw of the said shackle which receives the threaded end of the pin adjacent the abutment hasja recess on its inner faceto accommodate said ab'u'tmer'i't.

6. A shackle comprising a U -shaped' body part, the" jaws of which have eye holes; at least one of which-is internallyscrew-threaded, a closurehpi'n having a screw-threaded end to screw into said internally" threaded eye-hole, an abutment' located on the pin so that it lies adjacent the interior fac of one jaw when the pin is in the closed position, and a recess on the interior face ofthe other jaw, the base of which recess is adjacent the exterior face of the said jaw and forms a stop for the abutment the abutment en'e'gaging the stop to locate the pin wholly free of any projection within and between the ji'aws,. said recessed jaw having a passage-way which opens into the side of the recess and leads to the" exterior face of the jaw whereby by turning'the pin the abutment can be turned along the passage-way to release the abutment from the stop and the jaw ofthe shackle which receives the threaded end-of the pin adjacent the abutment having a recess on its inner face to accommodate said abutment.

7". A shackle comprsing a U-shaped .body part, the jaws of which have eye-holes both of which are screw threaded the screw-thread in one eye being of greater diameter than the screw-thread in the other eye, a closure pin having. screwthr'eaded' ends to screw into said internally threaded eyes of th shackle jaws, an abutment located on the pin at the end thereof having the thread" of smallest diameter and so that it lies against the interior face of the jaw when the pin is in the closed position, and a recess 0n the interior face of the other jaw the base of which recess is adjacent the exterior face of said jaw and forms a stop for the abutment, the abutment beingshaped as part of a screw-thread ofjeq'ual diameter to that of the larger threaded end ofthe pin so that it will co-operate with the .screw-ethread in the recessed jaw of the shackle and permit the pin to be screwed entirely out of said jaw and the jaw of the shackle which receives the threaded end of 'the pin adjacent the abutment having a recess on its inner face to accommodate said abutment.

.WILLIAM STEVENSON; 

